Comparison Sunding SD-563B vs Sunding SD-576C

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	Sunding SD-563B	Sunding SD-576C
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all specs only differences
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Main	Maintenance and lubrication warning, overspeed and underspeed warning.	Maximum travel time, minimum travel time, largest mileage, smallest mileage. Maintenance and lubrication warning, overspeed warning. Light sensor.
Basic parameters
Type	wired	wireless
Indications	current speed average speed max. speed speed ratio current distance /+ count back/ odometer current travel time /+ count back/ tripmeter	current speed average speed max. speed speed ratio current distance odometer current travel time tripmeter
Display
Output type	monochrome	monochrome /touch sensor/
Number of lines	4	4
Backlight
Sensors and communication
Sensors	thermometer	thermometer
More features
Functions	automatic start-stop clock timer and stopwatch battery level	automatic start-stop clock timer and stopwatch battery level
General
Water protection	+	+
Power source	non chargeable battery	non chargeable battery
Dimensions	57x40x18 mm	72x44x16 mm
Material	plastic	plastic
Weight	30 g
Added to E-Catalog	april 2020	april 2020

Type

The type determines, first of all, the method of communication with the remote wheel speed sensor. Recall that most bike computers are equipped with such a sensor, it is mounted on a fork, and a special magnet is attached to the wheel; when the wheel rotates, the device detects the passage of the magnet past the sensor and determines the revolutions by their frequency. The connection options are:

— Wired. The advantages of a wired connection are low cost, reliable connection, and the fact that the speed sensor does not require its own battery. And the battery of the computer itself with such a connection “lives” longer than with a wireless one. On the other hand, such devices are somewhat less convenient to install than wireless ones, and in case of an unsuccessful fall or collision, there is a risk of breaking the wire.

— Wireless. Such a connection allows you to do without unnecessary wires, which greatly simplifies the installation of the bike computer. At the same time, it costs more than a wired one, and two batteries are used in such a system — in the computer itself and in the speed sensor, and you will have to monitor both. Also, if there are many other wireless cycling computers nearby, the connection may fail.